[Xen-devel] [PATCH] tools/ocaml: abi check: #include on x86 only

* [Xen-devel] [PATCH] tools/ocaml: abi check: #include on x86 only
@ 2019-09-10 15:17 Ian Jackson
  2019-09-10 15:20 ` Andrew Cooper
  0 siblings, 1 reply; 2+ messages in thread
From: Ian Jackson @ 2019-09-10 15:17 UTC (permalink / raw)
  To: xen-devel
  Cc: Andrew Cooper, Ian Jackson, Christian Lindig, Wei Liu, David Scott

Reported-by: Andrew Cooper <Andrew.Cooper3@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
---
 tools/ocaml/libs/xc/xenctrl_stubs.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/tools/ocaml/libs/xc/xenctrl_stubs.c b/tools/ocaml/libs/xc/xenctrl_stubs.c
index f86ecc7b7e..3eff6dd8c2 100644
--- a/tools/ocaml/libs/xc/xenctrl_stubs.c
+++ b/tools/ocaml/libs/xc/xenctrl_stubs.c
@@ -135,7 +135,20 @@ static value c_bitmap_to_ocaml_list
 	CAMLparam0();
 	CAMLlocal2(list, tmp);
 
+#if defined(__i386__) || defined(__x86_64__)
+/*
+ * This check file contains a mixture of stuff, because it is
+ * generated from the whole of this xenctrl_stubs.c file (without
+ * regard to arch ifdefs) and the whole of xenctrl.ml (which does not
+ * have any arch ifdeffery).  Currently, there is only x86 and
+ * arch-independent stuff, and there is no facility in the abi-check
+ * script for arch conditionals.  So for now we make the checks
+ * effective on x86 only; this will suffice to defend even ARM
+ * because breaking changes to common code will break the build
+ * on x86 and not make it to master.  This is a bit of a bodge.
+ */
 #include "xenctrl_abi_check.h"
+#endif
 
 	list = tmp = Val_emptylist;
 
-- 
2.11.0


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